Patent US4193968A successfully refreshed from Google Patents.
US4193968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering gallium
Assignee: Atlantic Richfield Co
•
Filing: 1978-10-03
•
Granted: 1980-03-18
•
Expires: 1998-10-03
Abstract
Abstract The invention provides a process for recovering gallium from calcined clay leached with hydrochloric acid. The leach solution containing aluminum, ferric and gallium chlorides is treated by ion exchange to first remove aluminum ions, following which the solution containing ferric and gallium chlorides is treated to reduce the ferric ions to ferrous ions. The reduced solution is acidified with hydrochloric acid sufficiently to insure that the gallium is present in the form GaCl 4 - ions, and is then again treated by ion exchange to separate the ferrous ions from the gallium for ultimate recovery of the latter.
Inventors
- 👤 Robert E. Sullivan
- 👤 William R. Stern
- 👤 Bess L. Vance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:02
CPC Classifications
C; C22; C22B; C22B58/00; C22B3/00; C22B3/20; C22B3/26; C22B3/28; C22B3/282; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A process for recovering gallium from calcined clay which comprises leaching calcined clay with a hydrochloric acid solution, separating the hydrochloric acid solution from residuals, treating the hydrochloric acid solution containing aluminum chloride, ferric chloride, and gallium chloride in an organic-containing amine ion extraction unit for separately recovering aluminum chloride raffinate solution and an organic phase containing ferric chloride and gallium chloride, stripping the organic phase to yield a first strip extract solution containing ferric chloride and gallium chloride, reducing the ferric chloride in such solution to ferrous chloride and incorporating sufficient hydrochloric acid in the reduced solution to convert the gallium therein to GaCl 4 - ions, then treating said solution in a second organic-containing amine ion extraction unit for separately recovering a raffinate solution containing ferrous chloride and a second organic phase containing gallium, stripping the second organic phase to yield a second strip extract solution containing gallium, and recovering the gallium-containing solution.
Claim 2
Dependent Claim
155 words
A process for recovering gallium from calcined clay which comprises leaching calcined clay with a hydrochloric acid solution, separating the hydrochloric acid solution from residuals, treating the hydrochloric acid solution containing aluminum chloride, ferric chloride, and gallium chloride in an organic-containing amine ion extraction unit for separately recovering aluminum chloride raffinate solution and an organic phase containing ferric chloride and gallium chloride, stripping the organic phase to yield a first strip extract solution containing ferric chloride and gallium chloride, reducing the ferric chloride in such solution to ferrous chloride and incorporating sufficient hydrochloric acid in the reduced solution to convert the gallium therein to GaCl 4 - ions, then treating said solution in a second organic-containing amine ion extraction unit for separately recovering a raffinate solution containing ferrous chloride and a second organic phase containing gallium, stripping the second organic phase to yield a second strip extract solution containing gallium, and recovering the gallium-containing solution.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the amine used as an extraction medium in each amine ion extraction unit is triisooctylamine dissolved in kerosene.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the ferric chloride is reduced by metallic iron reduction.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the ferric chloride is reduced by hydrogen gas.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-18 | 1983-09-17 | 1984-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-18 | 1987-09-17 | 1988-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-18 | 1991-09-17 | 1992-03-18 | $7700.00 | Window Closed / Lapsed |